SN75C1406NSR datasheet by Texas Instruments

SN75C1406NSR Frequently Asked Questions (FAQs)

• What is the maximum operating frequency of the SN75C1406NSR?
  The maximum operating frequency of the SN75C1406NSR is 100 MHz, but it can be operated at higher frequencies with reduced signal amplitude and increased power supply noise.
• How do I ensure signal integrity when using the SN75C1406NSR?
  To ensure signal integrity, use a low-impedance PCB layout, keep signal traces short and away from noise sources, and use termination resistors at the receiver end. Also, ensure that the power supply is clean and well-regulated.
• Can I use the SN75C1406NSR in a 3.3V system?
  Yes, the SN75C1406NSR can be used in a 3.3V system, but the input voltage threshold will be higher than the typical 1.4V for a 5V system. Ensure that the input signal amplitude is sufficient to meet the minimum input voltage threshold.
• How do I handle EMI and RFI when using the SN75C1406NSR?
  To minimize EMI and RFI, use a shielded cable, keep the transmitter and receiver close together, and use a common-mode choke or ferrite bead on the cable. Also, ensure that the PCB layout is designed to minimize radiation.
• What is the maximum cable length supported by the SN75C1406NSR?
  The maximum cable length supported by the SN75C1406NSR depends on the cable characteristics, signal frequency, and amplitude. As a general rule, the maximum cable length is around 100 meters at 100 Mbps, but it can be longer or shorter depending on the specific application.